I have compiled a chart showing how to read the Yamaha outboard codes. I spoke with a Yamaha Customer Relations Rep. and he gave me the informaion via phone. I wrote them down as he was reading them to me so there is a possiblily of omissions and errors. If you find any please contact me or post the error so I can correct this information. Thanks<br /><br /> http://www.ux1.eiu.edu/~csrld1/Fishing/syamcode.jpg